Question

5. If m=-2 and n = 2; find the value of :
(1) m2 + n2 - 2mn
(ii) mp + nm
(iii) 6m-3 + 4n2
(iv) 2n3 – 3m
Exponents (Including Laws of Exponents)​

Answer 1

${\huge{\sf{\underline{\underline{Solution}}}}}$

$\:\:\:{\sf{given:m\:=\:-2\:and:n\:=\:2}}$

●${\sf{m{^2}+n{^2}-2mn}}$

$\:\:\:{\sf{(-2) {^2}+2{^2}-2×-2×2}}$

$\:\:{\sf{4+4+8}}$

${\sf{\boxed{\boxed{Answer=>16}}}}$

●${\sf{mn+nm}}$

$\:\:{\sf{-2×2+2(-2) }}$

$\:\:{\sf{-4-4}}$

${\sf{\boxed{\boxed{Answer=>-8}}}}$

●${\sf{6m-3+4n{^2}}}$

$\:\:{\sf{6(-2) -3+4×2{^2}}}$

$\:\:{\sf{-12-3+4×4}}$

$\:\:{\sf{-15+16}}$

${\sf{\boxed{\boxed{Answer=>1}}}}$

●${\sf{2n{^3}-3m}}$

$\:\:{\sf{2(2) {^3}-3(-2) }}$

$\:\:{\sf{2×8+6}}$

$\:\:{\sf{16+6}}$

${\sf{\boxed{\boxed{Answer=>22}}}}$

Answer 2

Answer:

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Step-by-step explanation:

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